<template>
  <div class="login-container">
    <!-- 导航栏 -->
    <van-nav-bar class="page-nav-bar" title="登录">
      <van-icon slot="left" name="cross" @click="$router.back()" />
    </van-nav-bar>
    <!-- /导航栏 -->
    <!-- 登陆表单 -->
    <van-form ref="loginFormRef" @submit="onSubmit">
      <van-field
        name="mobile"
        v-model="user.mobile"
        placeholder="请输入手机号"
        :rules="userFormRules.mobile"
        type="number"
        maxlength="11"
      >
        <i slot="left-icon" class="toutiao toutiao-shouji"></i>
      </van-field>
      <van-field
        name="code"
        v-model="user.code"
        placeholder="请输入验证码"
        :rules="userFormRules.code"
        type="number"
        maxlength="6"
      >
        <i slot="left-icon" class="toutiao toutiao-yanzhengma"></i>
        <template #button>
          <!-- time：倒计时 -->
          <van-count-down
            v-if="isCountDownShow"
            :time="1000 * 60"
            format="ss s"
            @finish="isCountDownShow = false"
          />
          <van-button
            v-else
            class="send-sms-btn"
            round
            size="small"
            native-type="button"
            type="default"
            @click="onSendSMS"
            >获取验证码</van-button
          >
        </template>
      </van-field>
      <div class="login-btn-wrap">
        <van-button class="login-btn" block type="info" native-type="submit"
          >登陆</van-button
        >
      </div>
    </van-form>
    <!-- /登陆表单 -->
  </div>
</template>
<script>
import { login, sendSMS } from '@/api/user'
export default {
  name: 'LoginIndex',
  components: {},
  props: {},
  data() {
    return {
      user: {
        mobile: '13951861029', // 手机号
        code: '246810' // 验证码
      },
      userFormRules: {
        mobile: [
          {
            required: true,
            message: '手机号不能为空'
          },
          {
            pattern: /^1[3|5|7|8|9]\d{9}$/,
            message: '手机号格式错误'
          }
        ],
        code: [
          {
            required: true,
            message: '验证码不能为空'
          },
          {
            pattern: /^\d{6}$/,
            message: '验证码格式错误'
          }
        ]
      },
      isCountDownShow: false // 是否展示倒计时
    }
  },
  computed: {},
  watch: {},
  methods: {
    async onSubmit(values) {
      //  1.获取表单数据
      const user = this.user
      //  2.表单验证
      // 注意：在组件中必须通过 this.$toast 来调用 Toast 组件
      this.$toast.loading({
        message: '登录中...',
        forbidClick: true, // 禁用背景点击
        duration: 0, // 持续时间，默认2000，若为 0 则持续展示
        loadingType: 'spinner'
      })
      //  3.提交表单请求登录
      try {
        const { data } = await login(user)
        // console.log(res)
        this.$store.commit('setUser', data.data)
        this.$toast.success('登录成功！') // 注意 Toast 组件，后面的调用会代替前面的调用

        // 登陆成功跳转至原来页面
        // back 方式不严谨
        this.$router.back()
      } catch (error) {
        if (error.response && error.response.status === 400) {
          // console.log('手机号或验证码错误！')
          this.$toast.fail('手机号或验证码失效！')
        } else {
          console.log('登录失败,稍后重试', error)
          this.$toast.fail('登录失败，未知错误！')
        }
      }
    },
    //  4.根据请求响应结果处理后续操作
    async onSendSMS() {
      // 1.校验手机号
      try {
        await this.$refs.loginFormRef.validate('mobile')
        console.log('验证通过')
      } catch (error) {
        return console.log('验证失败', error)
      }
      // 2.验证通过，显示倒计时
      this.isCountDownShow = true

      // 3.请求发送验证码
      try {
        await sendSMS(this.user.mobile)
        this.$toast.success('发送成功！')
      } catch (error) {
        // 2.发送失败，关闭倒计时
        this.isCountDownShow = false
        if (error.response.status === 429) {
          this.$toast.fail('发送过于频繁，请稍候再试！')
        } else {
          this.$toast('发送失败！')
        }
      }
    }
  },
  created() {},
  mounted() {}
}
</script>
<style scoped lang="less">
.login-container {
  .toutiao {
    font-size: 37px;
  }
  .send-sms-btn {
    background-color: #ededed;
    height: 46px;
    line-height: 46px;
    font-size: 22px;
    color: #666;
  }
  .login-btn-wrap {
    padding: 53px 33px;
    .login-btn {
      background-color: #6db4fb;
      border: none;
    }
  }
}
</style>
